Outline data image drawing apparatus applying image drawing direction rules and image drawing rules

• US 5,274,752 A
• Filed: 10/12/1990
• Issued: 12/28/1993
• Est. Priority Date: 02/09/1990
• Status: Expired due to Fees

• Current Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: Kawazome, Ichiro
• Primary Examiner(s): Harkcom, Gary V.
• Assistant Examiner(s): JANKUS, ALMIS R
• Application Number:
  US07/596,397
• Time in Patent Office: 1,173 Days
• Field of Search: 395/133-139, 395/119-120, 395/141-143
• US Class Current: 345/619
• CPC Class Codes: G06T 11/40 Filling a planar surface by adding surface attributes, e.g. colour or texture

Abstract

A scan conversion device generates segment direction information on the basis of vector information representing outlines of a pattern such as graphic FIGURES. An image drawing data generating device generates raster information inclusive of image drawing direction information in accordance with predetermined image drawing direction rules on the basis of the segment direction information, and further generates new image drawing data to be stored into a frame memory in accordance with predetermined image drawing rules on the basis of the raster information and previous image drawing data read from the corresponding memory area of the frame memory. The frame memory stores the image drawing data on a dot-by-dot basis. A dot pattern converting device converts the image drawing data provided from the frame memory into a dot pattern signal in accordance with an image drawing mode as set.

Claims

1. An outline data image drawing apparatus comprising:

scan conversion means for converting vector information representing an outline of a pattern such as a graphic FIGURE into segment direction information representing image drawing direction information for a multiplicity of vector segments;

memory means for storing image drawing data as a bit map on a dot-by-dot basis;

memory means for storing image drawing data as a bit map on a dot-by-dot basis;

image drawing data generation means for generating raster information having image drawing direction information from the segment direction information of the scan conversion means in accordance with predetermined image drawing direction rules, and for generating new image drawing data from the raster information and from previous image drawing data, stored in the memory means and having a bit-mapped correspondence to the new image drawing data, in accordance with predetermined image drawing rules, and for transmitting as output the new image drawing data to the memory means; and

dot pattern conversion means for converting the image drawing data provided from the memory means into a dot pattern signal in accordance with an image drawing mode as set in the dot pattern conversion means, wherein the image drawing mode includes an inverting processing mode.